Pentax 645Z vs Sony RX100

Let's look a little more closely at the Pentax 645Z and Sony RX100, one is a Pro DSLR and the other is a Large Sensor Compact by companies Pentax and Sony. There is a huge difference between the image resolutions of the 645Z (51MP) and RX100 (20MP) and the 645Z (Medium format) and RX100 (1") have different sensor sizing.

Photography Glossary

The 645Z was revealed 20 months after the RX100 making them a generation away from each other. Both of these cameras feature different body design with the Pentax 645Z being a Large SLR camera and the Sony RX100 being a Large Sensor Compact camera.

Before getting into a more detailed comparison, here is a quick introduction of how the 645Z scores versus the RX100 when considering portability, imaging, features and an overall mark.

Here is a sample of the gallery pics for Pentax 645Z and Sony Cyber-shot DSC-RX100. The full galleries are provided at Pentax 645Z Gallery and Sony RX100 Gallery.

For anybody who is aiming to travel with your camera, you are going to need to take into account its weight and measurements. The Pentax 645Z provides outside measurements of 156mm x 117mm x 123mm (6.1" x 4.6" x 4.8") along with a weight of 1550 grams (3.42 lbs) and the Sony RX100 has proportions of 102mm x 58mm x 36mm (4.0" x 2.3" x 1.4") and a weight of 240 grams (0.53 lbs).

Check out the Pentax 645Z and Sony RX100 in the new Camera and Lens Size Comparison Tool.

Remember, the weight of an Interchangeable Lens Camera will vary dependant on the lens you use at the time. Underneath is a front view measurement comparison of the 645Z against the RX100.

Factoring in size and weight, the portability rating of the 645Z and RX100 is 49 and 91 respectively.

In many cases, it can be difficult to picture the gap between sensor dimensions just by reading a spec sheet. The picture underneath should provide you a much better sense of the sensor sizing in the 645Z and RX100.

Clearly, each of the cameras feature different resolutions and different sensor dimensions. The 645Z using its larger sensor is going to make getting bokeh less difficult and the Pentax 645Z will deliver extra detail because of its extra 31MP. Greater resolution will help you crop pics way more aggressively. The newer 645Z should have an advantage with regard to sensor tech.